Alarm-lock



' (ModeL) 2 Sheets-Sheet 1.

P. FRANCIS.

ALARM LOOK.

No. 427,411. Patented May 6, 1.890.

. (Model.) 2 Sheets-Sheet 2.

P. FRANCIS.

ALARM LOOK.

No. 427,411. Patented a 6', 1890.

' UNITED STATES PETER FRANCIS, OF PETERSBURG, VIRGINIA.

ALARM-LOCK.

SPECIFICATION forming part of Letters Patent No. 427,411, dated May 6, 1890.

Application filed January 2'7, 1890. Serial No. 333,303. tModel.)

To all whom it may concern.-

Be it known that I, PETER FRANCIS, a citizen of the United States, residing at Petersburg, in the county of Dinwiddie and State of Virginia, have invented new and useful Improvements in Locks, of which the following is a specification.

This invention relates to a combination-lock comprising an alarm mechanism for sounding a gong and making an alarm when the lock is manipulated; and the invention consists in the construction and combination of parts hereinafter described and claimed.

In the annexed drawings, illustrating the invention, Figure 1 is a view of a portion of j the inner side of a door with my combined lock and alarm attached. Fig. 2 is a vertical longitudinal section of the lock on the line 00 0c of Fig. 4. Fig. 3 is a View of a portion of the outer side' of a door to which my improved lock is attached. Fig. 4 is a vertical transverse section of the lock on the line y y of Fig. 2. Fig. 5 is a perspective view of parts of the lock detached from each other to show their construction more clearly.

Referring in detail to the various parts of the lock shown in the drawings, the referencenumeral 1 designates a look-casing, which is secured in any suitable manner to the inner side of a door 2, either by means of screws or otherwise.

Supported horizontally in the lock-case 1 is a locking bar or bolt 3, which is sufficiently long to project through both ends of the casing, as shown in Fig. 2. One end of this bolt or locking-bar 3 is adapted to engage akeeperet in or upon the door-frame, as shown in Fig. 1. The inner end of the bolt 3 is provided outside the lock-case with a shoulder 5, that is adapted to come in contact with the adjacent end of the casing and limit the movement of the bolt in the act of engaging the keeper. The outer side of the bolt 3 is provided with a spindle or stud 6, Fig. 5, which projects horizontally through a horizontal slot 7 Fig. 3, in the outer side of the lock-case and door, and on the end of this stud or spindle 6 is a small knob or handle 8, by which the bolt can be manipulated from the outside of the door to withdraw said bolt from its keeper 4 when the door is closed. The shouldered and proj ecting inner end of the bolt 3 affords a means for withdrawing it from the inside. \Vhen the bolt 3 is engaged in the keeper, it is automatically locked by means of a verticallysliding dog 9, engaging 'a vertical mortise or recess 10 formed in the bolt, as shown in Figs. 4 and 5. The upper end of the dog 9 is provided with a stem 11, which projects through an opening in the top of the lock-case on the inner side .of the door and carries a knob or handle 12 on its upper end, by which the dog 9 can be raised from the inside of the door and disengaged from the bolt 3 to permit its withdrawal from the keeper. Surrounding the stem 11 within the lock-case is a spiral spring 13, by which the dog 9 is positively seated in the mortise or recess 10 of the bolt 3, soas to automatically lock the said bolt when it is projected into the keeper. In one side of the dog 9 is a notch 14, by which it can be raised, and thus release thebolt from the outside of the door, as presently explained.

' On the outside of the door is a rotary centrally perforated dial -.plate 15, having attached to its inner side a central sleeve 16, which projects inward through a circular opening in the door and through similar I openings 17 in the lock case or frame. The inner end of the sleeve 16 is provided with a longitudinal slot 18, which can be made to register with a slot 19, that forms part of the inner opening 17 of the lock-frame. In the sleeve 16 is supported a rotary spindle 20, having thumb-pieces 21 attached to its outer end in front of the dial, by which said spin dle can be rotated to bring a lug 22 near its inn er end into line with the registering. slots 18 and 19, when the sleeve 16 has been turned into proper position to unfasten the lock. The slotted sleeve 16 is preferably attached to the rear or inner face of the dial-plate 15 by means of an annular boss 23, into which the end of the sleeve is inserted, anda setscrew 24:, that connects said sleeve and boss in such a manner that by loosening the setscrew the sleeve 16 can be adjusted and then secured by said screw, so that the slot 18 will register with the slot 19 when any predetermined one of a series of alphabetical characters or other signs on the face of the dial-plate is brought by the rotation of said dial-plate into position to register with some mark or index on the door, which index may be one of a number of screws 25, by which the rotary dial and its attached sleeve are held in place, as shown in Figs. 3 and 4. For instance, the sleeve 16 can be attached to the dial-plate in such position that when the dial-plate is rotated to cause the letter O to register with the upper screw the slot 18 will be thereby brought into line with the slot 19, and by means of the thumb-pieces 21 the spindle 20 can now be rotated and drawn slightly outward to engage its lug 22 in the registering slots 18 and 19 and in the notch 14 of the dog 9, when by rotating the spindle the dog 9 will be lifted and disengaged from the bolt 3, as shown in Fig. 2. The bolt 3 can now be drawn from the outside by takinghold of the small knob 8 and moving the stud 6 backward in the slot 7, to enable the door to be opened, and when the bolt is thus drawn the dog 9 will rest on the top of said bolt clear from engagement with the mortise or recess 10, with which it was before engaged. On again closing the door the bolt 3 can be engaged with its keeper 4: from the outside of the door by means of the stud 6 and knob 8, or from the inside by simply pushing the shouldered end 5 of said bolt toward the end of the lock-case. The mortise 10 is thus brought beneath the dog 9, which becomes automatically seated therein under the action of its spring 13, and the door is thus locked. The door can be opened from the inside by first lifting the dog 9 by means of its knob or handle 12, and then catching hold of the inner projecting or shouldered end of the .bolt 3 and withdrawing it from the keeper. It is obvious that instead of setting the lock to open from the outside on the letter 0, as described, any other letter of the alphabet can-be selected, and the lock can be so set that the selected letter must register with the lower screw 25, or any other one of the screws, or any other mark, instead of the upper screw, as above described. These screws 25 are arranged, as shown, just outside the periphery of the dial-plate 15, and do not interfere with its rotation.

To the lock-case 1, on the inner side of the door, is secured a disk or plate 26, having a central stud 27, on which an alarm-gong 28 is supported. To the plate 26 within the gong is pivoted a three-armed lever 29, having two of its arms in contact with two nearly verti cal swinging arms 30, that are also pivoted to said plate within the gong. A two-armed spring 31, attached to the plate 26, affords a yielding support to the arms 30 on the side opposite their points of cont-act with the threearmed lever 29, and a rigid stop for the free ends of the arms 30 is afforded by a lug 32, projecting from the gong-supporting plate. The arms 30 and spring 31 afford a yielding bearing for the three-armed lever 29, which is arranged to be operated from the spindle 20, as presently explained. One or both of the arms 30 may be provided with a gonghammer 33, as shown in Fig. 1. The inner end of the spindle 20 is squared, as shown in Fig. 5, and on this squared end 34 of the spindle is loosely mounted a plate 35, having a number of pins 36 projecting horizontally therefrom in position to be brought in contact with the lever 29, and so actuate the hammer 33 to sound the gong when the spindle 20 is rotated. Itwill thus be seen that any surreptitious attempt to unfasten the look from the outside will cause the gong to sound and give an alarm. 'It is obviousthat by simply removing the pin-carrying plate 35 from the spindle 20 the gong mechanism can be made inoperative whenever desired.

The ordinary door-knob 37 may connect with any suitable latching mechanism independent of the locking and alarm devices above described. In this latch mechanism, as shown, the knob-spindle 38 is provided with a pin 39, which engages with the shank of a spring-pressed latch-bolt 40, as shown in Fig. 2; but it is obvious that the latch and knob-spindle may be connected in any other suitable manner.

As shown in the drawings, the lock-frame comprises, besides the outer case 1, a bar 41, that is suitably recessed for the reception of the bolt 3 and dog 9, and also the Vertical longitudinal plates 42, having the openings 17 for passage of the dial-sleeve; but it will be understood that I do not confine myself to a lock case or frame of any particular construction.

l/Vhat I claim as my invention is 1. The combination of a lock-case having openings 17, one of which is provided with a slot 19, the bolt 3, having recess 10, the vertically-sliding dog 9, having notch 14, the rotary dial-plate 15, having a sleeve 16, provided with a slot 18, adapted to register with the slo 19, and the rotary and longitudinally movao'le spindle 20, having a lug 22 to register with and engage the slots 18 and 19 and notched dog 9 and provided on its outer end with thumb-piece 21, substantially as described.

2. The combination of a recessed and slot ted lock-case, a recessed horizontally-movable bolt, a vertically-sliding dog to engage said bolt, a rotary dial-plate having a sleeve provided with a slot to register with a corresponding slot in the lock-case, a rotary and longitudinally-movable spindle having a lug to engage the registering slots of the lockcase and sleeve and to engage and lift the dog, a gong, a gong-hammer, levers for actu- I l i ating said hammer, and a plate mounted on provided with pins 36 to actuate the hammerthe rotary spindle and having pins to engage levers, substantially as described. 10 and operate the hammer-levers, substantially In testimony whereof I have afiixed my sigas described. nature in presence of two Witnesses.

3. The combination, with a lock, the gong PETER FRANCIS. 28, and the lock-operating spindle 20, of the WVitncsses: spring 31, the hammer-levers 29 and 30, and I. V. HERRING, the plate 35, mounted on the spindle 20 and R. H. JONES, J r. 

